> ## Documentation Index > Fetch the complete documentation index at: https://docs.vasl.sh/llms.txt > Use this file to discover all available pages before exploring further. # Operations > Metrics, logs, traces, sizing, and how you restart. The person on call needs three things from the install: a metric, a log line, and a trace for the one stream that failed. ## What the process exposes * Prometheus metrics for the host and the sessions * Structured logs * A trace you can follow per stream Watch the protocols you actually serve. A WebRTC session and an HLS crowd stress the machine in different ways. Size the instance for the concurrency you sold, then read the metrics before you add a second machine. ## Where it sits The same install runs in a datacenter, on a cloud VM, or on a network that never touches the public internet. See [Install](/install) for Docker, the binary, and the package. ## Restart Drain viewers, then restart. Shutdown hooks exist so you leave a live room on purpose. A warm standby is a second machine you keep ready. You put your own load balancer in front of the pair. One license covers one media server instance. This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.